10 Best Flea Shampoos 2025 in the United States

Adams Plus Flea & Tick Shampoo with Precor is a versatile flea treatment suitable for both cats and dogs over 12 weeks old. One of its main strengths is its effectiveness in killing not only adult fleas but also flea eggs, ticks, and lice, which helps prevent reinfestation. The inclusion of Precor, an Insect Growth Regulator, ensures that flea eggs are managed for up to 28 days, offering long-lasting protection.

Adams Plus Flea & Tick Shampoo with Precor is formulated for cats, kittens, dogs, and puppies over 12 weeks of age, making it suitable for a wide range of pets. One of its main strengths is the ability to kill adult fleas, flea eggs, ticks, and lice, providing comprehensive pest control. The presence of Precor, an Insect Growth Regulator, helps prevent flea reinfestation by inhibiting the hatching of flea eggs for up to 28 days.

The Veterinary Formula Flea and Tick Shampoo is designed for both dogs and cats aged 12 weeks and older, making it suitable for most pets. It uses pyrethrum, a natural insecticide, combined with other active ingredients to provide strong on-contact flea and tick control. This means it works quickly to relieve common flea-related issues like itching, flea dirt, and skin irritation. Its soap- and paraben-free formula is gentle on your pet’s skin, which is important for animals with sensitivity or allergies. The shampoo is unscented, so it won’t bother pets or owners sensitive to fragrances. It’s also pH balanced specifically for pets, unlike human shampoos that can be harsher.